Vapor adsorption limitation of graphene nanoribbons in quasi conductance increment: a NEGF approach

Shakil, Shifur Rahman; Zohra, Fatema Tuz; Pramanik, Parna; Tushar, Raihanul Islam; Saha, Atanu Kumar; Bhuian, Md Belal Hossain

Date

2015

Publisher

Citation

Shakil, S. R., Zohra, F. T., Pramanik, P., Tushar, R. I., Atanu Kumar, S., & Hossain Bhuian, M. B. (2015). Vapor adsorption limitation of graphene nanoribbons in quasi conductance increment: A NEGF approach. Paper presented at the 2015 IEEE 10th International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2015, 366-371. doi:10.1109/NEMS.2015.7147445

Abstract

The adsorption of H2O molecules on Armchair Graphene Nanoribbons (A-GNR) was theoretically studied using Non Equilibrium Green Function (NEGF) formalism to determine Device Density of States (DDOS), Electrostatic Effective Potential (EDP), Conductivity (G) and Current-Voltage (I-V) characteristics. This paper analyzed the performance of semiconducting graphene nanoribbon (N=10), metallic graphene nanoribbon (N=11) and cascade hetero-graphene nanoribbon to consider the effect of H2O adsorption on GNR and conclude that for low voltage application semiconducting A-GNR will be a better choice over metallic A-GNR and cascade A-GNR. The optimum area for adsorbing maximum number of H2O molecules on A-GNR has been studied. It has been observed that the increment of quasi conductance resulting sensing performance for limited number of H2O adsorption. To overcome this problem, a new device model has been proposed.

Keywords

DDOS; EDP; GNR; Graphene; Quasi conductance

Description

This conference paper was presented in the 10th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2015; Xi'an; China; 7 April 2015 through 11 April 2015 [© 2015 Institute of Electrical and Electronics Engineers Inc.] The conference paper's definite version is available at: http://10.1109/NEMS.2015.7147445

Publisher Link

http://ieeexplore.ieee.org/document/7147445/

DOI

10.1109/NEMS.2015.7147445

Department

Department of Electrical and Electronic Engineering

Type

Conference Paper